EP 0058412 B1 19870401 - ELECTROMAGNETIC HELMET ORIENTATION DETERMINING SYSTEM
Title (en)
ELECTROMAGNETIC HELMET ORIENTATION DETERMINING SYSTEM
Publication
Application
Priority
US 23374781 A 19810212
Abstract (en)
[origin: EP0058412A2] An electromagnet system for determining the orientation including position of a helmet worn by a pilot is disclosed having a transmitting antenna (11) for transmitting electromagnetic field vectors, a receiving antenna (12) for sensing the electromagnetic field vectors generated by the transmitting antenna, and a control apparatus (22-62) responsive to the sensed electromagnetic field vectors and the transmitted electromagnetic field vectors for determining the compensated orientation of the helmet, the compensated orientation relying upon the rotation matrix determined by a previous solution for the orientation of the helmet.
IPC 1-7
IPC 8 full level
G01B 7/00 (2006.01); G01B 7/004 (2006.01); G01B 7/30 (2006.01); G01B 7/312 (2006.01); G01S 5/02 (2010.01); G01S 19/19 (2010.01)
CPC (source: EP US)
G01B 7/004 (2013.01 - EP US); G01S 5/0247 (2013.01 - EP US); H01F 2005/027 (2013.01 - EP US)
Citation (examination)
- FR 2458838 A1 19810102 - THOMSON CSF
- EP 0021906 A1 19810107 - THOMSON CSF [FR]
- US 4287809 A 19810908 - EGLI WERNER H, et al
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0058412 A2 19820825; EP 0058412 A3 19821201; EP 0058412 B1 19870401; CA 1176357 A 19841016; DE 3275949 D1 19870507; JP H0250402 B2 19901102; JP S589005 A 19830119; US 4394831 A 19830726
DOCDB simple family (application)
EP 82101046 A 19820212; CA 393791 A 19820108; DE 3275949 T 19820212; JP 2193582 A 19820212; US 23374781 A 19810212